
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Author: Ricardo Garcia Gonzalez
# Author: Danny Colligan
# Author: Benjamin Johnson
# Author: Vasyl' Vavrychuk
# License: Public domain code
from PyQt4 import QtCore
import cookielib
import datetime
import htmlentitydefs
import httplib
import locale
import math
import netrc
import os
import os.path
import re
import socket
import string
import subprocess
import sys
import time
import urllib
import urllib2

# parse_qs was moved from the cgi module to the urlparse module recently.
try:
    from urlparse import parse_qs
except ImportError:
    from cgi import parse_qs

std_headers = {
    'User-Agent': 'Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101028 Firefox/3.6.12',
    'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language': 'en-us,en;q=0.5',
}

simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii') #@UndefinedVariable

def preferredencoding():
    """Get preferred encoding.

    Returns the best encoding scheme for the system, based on
    locale.getpreferredencoding() and some further tweaks.
    """
    def yield_preferredencoding():
        try:
            pref = locale.getpreferredencoding()
            u'TEST'.encode(pref)
        except:
            pref = 'UTF-8'
        while True:
            yield pref
    return yield_preferredencoding().next()

def htmlentity_transform(matchobj):
    """Transforms an HTML entity to a Unicode character.
    
    This function receives a match object and is intended to be used with
    the re.sub() function.
    """
    entity = matchobj.group(1)

    # Known non-numeric HTML entity
    if entity in htmlentitydefs.name2codepoint:
        return unichr(htmlentitydefs.name2codepoint[entity])

    # Unicode character
    mobj = re.match(ur'(?u)#(x?\d+)', entity)
    if mobj is not None:
        numstr = mobj.group(1)
        if numstr.startswith(u'x'):
            base = 16
            numstr = u'0%s' % numstr
        else:
            base = 10
        return unichr(long(numstr, base))

    # Unknown entity in name, return its literal representation
    return (u'&%s;' % entity)

def sanitize_title(utitle):
    """Sanitizes a video title so it could be used as part of a filename."""
    utitle = re.sub(ur'(?u)&(.+?);', htmlentity_transform, utitle)
    return utitle.replace(unicode(os.sep), u'%')

def sanitize_open(filename, open_mode):
    """Try to open the given filename, and slightly tweak it if this fails.

    Attempts to open the given filename. If this fails, it tries to change
    the filename slightly, step by step, until it's either able to open it
    or it fails and raises a final exception, like the standard open()
    function.

    It returns the tuple (stream, definitive_file_name).
    """
    try:
        if filename == u'-':
            if sys.platform == 'win32':
                import msvcrt
                msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
            return (sys.stdout, filename)
        stream = open(filename, open_mode)
        return (stream, filename)
    except (IOError, OSError), err:
        # In case of error, try to remove win32 forbidden chars
        filename = re.sub(ur'[/<>:"\|\?\*]', u'#', filename)

        # An exception here should be caught in the caller
        stream = open(filename, open_mode)
        return (stream, filename)

class DownloadError(Exception):
    """Download Error exception.
    
    This exception may be thrown by FileDownloader objects if they are not
    configured to continue on errors. They will contain the appropriate
    error message.
    """
    pass

class SameFileError(Exception):
    """Same File exception.

    This exception will be thrown by FileDownloader objects if they detect
    multiple files would have to be downloaded to the same file on disk.
    """
    pass

class PostProcessingError(Exception):
    """Post Processing exception.

    This exception may be raised by PostProcessor's .run() method to
    indicate an error in the postprocessing task.
    """
    pass

class UnavailableVideoError(Exception):
    """Unavailable Format exception.

    This exception will be thrown when a video is requested
    in a format that is not available for that video.
    """
    pass

class ContentTooShortError(Exception):
    """Content Too Short exception.

    This exception may be raised by FileDownloader objects when a file they
    download is too small for what the server announced first, indicating
    the connection was probably interrupted.
    """
    # Both in bytes
    downloaded = None
    expected = None

    def __init__(self, downloaded, expected):
        self.downloaded = downloaded
        self.expected = expected

class FileDownloader(object):
    """File Downloader class.

    File downloader objects are the ones responsible of downloading the
    actual video file and writing it to disk if the user has requested
    it, among some other tasks. In most cases there should be one per
    program. As, given a video URL, the downloader doesn't know how to
    extract all the needed information, task that InfoExtractors do, it
    has to pass the URL to one of them.

    For this, file downloader objects have a method that allows
    InfoExtractors to be registered in a given order. When it is passed
    a URL, the file downloader handles it to the first InfoExtractor it
    finds that reports being able to handle it. The InfoExtractor extracts
    all the information about the video or videos the URL refers to, and
    asks the FileDownloader to process the video information, possibly
    downloading the video.

    File downloaders accept a lot of parameters. In order not to saturate
    the object constructor with arguments, it receives a dictionary of
    options instead. These options are available through the params
    attribute for the InfoExtractors to use. The FileDownloader also
    registers itself as the downloader in charge for the InfoExtractors
    that are added to it, so this is a "mutual registration".

    Available options:

    username:         Username for authentication purposes.
    password:         Password for authentication purposes.
    usenetrc:         Use netrc for authentication instead.
    quiet:            Do not print messages to stdout.
    forceurl:         Force printing final URL.
    forcetitle:       Force printing title.
    forcethumbnail:   Force printing thumbnail URL.
    forcedescription: Force printing description.
    simulate:         Do not download the video files.
    format:           Video format code.
    format_limit:     Highest quality format to try.
    outtmpl:          Template for output names.
    ignoreerrors:     Do not stop on download errors.
    ratelimit:        Download speed limit, in bytes/sec.
    nooverwrites:     Prevent overwriting files.
    retries:          Number of times to retry for HTTP error 5xx
    continuedl:       Try to continue downloads if possible.
    noprogress:       Do not print the progress bar.
    playliststart:    Playlist item to start at.
    playlistend:      Playlist item to end at.
    logtostderr:      Log messages to stderr instead of stdout.
    """

    params = None
    _ies = []
    _pps = []
    _download_retcode = None
    _num_downloads = None
    _screen_file = None

    def __init__(self, params, parentThread):
        """Create a FileDownloader object with the given options."""
        self._ies = []
        self._pps = []
        self._download_retcode = 0
        self._num_downloads = 0
        self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
        self.params = params
        self.parentSingularThread = parentThread
    
    @staticmethod
    def pmkdir(filename):
        """Create directory components in filename. Similar to Unix "mkdir -p"."""
        components = filename.split(os.sep)
        aggregate = [os.sep.join(components[0:x]) for x in xrange(1, len(components))]
        aggregate = ['%s%s' % (x, os.sep) for x in aggregate] # Finish names with separator
        for dir in aggregate:
            if not os.path.exists(dir):
                os.mkdir(dir)
    
    @staticmethod
    def temp_name(filename):
        """Returns a temporary filename for the given filename."""
        if filename == u'-' or (os.path.exists(filename) and not os.path.isfile(filename)):
            return filename
        return filename + u'.part'
    
    @staticmethod
    def format_bytes(bytes):
        if bytes is None:
            return 'N/A'
        if type(bytes) is str:
            bytes = float(bytes)
        if bytes == 0.0:
            exponent = 0
        else:
            exponent = long(math.log(bytes, 1024.0))
        suffix = 'bkMGTPEZY'[exponent]
        converted = float(bytes) / float(1024**exponent)
        return '%.2f%s' % (converted, suffix)

    @staticmethod
    def calc_percent(byte_counter, data_len):
        if data_len is None:
            return '---.-%'
        return '%6s' % ('%3.1f' % (float(byte_counter) / float(data_len) * 100.0))

    @staticmethod
    def calc_eta(start, now, total, current):
        if total is None:
            return '--:--'
        dif = now - start
        if current == 0 or dif < 0.001: # One millisecond
            return '--:--'
        rate = float(current) / dif
        eta = long((float(total) - float(current)) / rate)
        (eta_mins, eta_secs) = divmod(eta, 60)
        if eta_mins > 99:
            return '--:--'
        return '%02d:%02d' % (eta_mins, eta_secs)

    @staticmethod
    def calc_speed(start, now, bytes):
        dif = now - start
        if bytes == 0 or dif < 0.001: # One millisecond
            return '%10s' % '---b/s'
        return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))

    @staticmethod
    def best_block_size(elapsed_time, bytes):
        new_min = max(bytes / 2.0, 1.0)
        new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
        if elapsed_time < 0.001:
            return long(new_max)
        rate = bytes / elapsed_time
        if rate > new_max:
            return long(new_max)
        if rate < new_min:
            return long(new_min)
        return long(rate)

    @staticmethod
    def parse_bytes(bytestr):
        """Parse a string indicating a byte quantity into a long integer."""
        matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
        if matchobj is None:
            return None
        number = float(matchobj.group(1))
        multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
        return long(round(number * multiplier))

    def add_info_extractor(self, ie):
        """Add an InfoExtractor object to the end of the list."""
        self._ies.append(ie)
        ie.set_downloader(self)
    
    def add_post_processor(self, pp):
        """Add a PostProcessor object to the end of the chain."""
        self._pps.append(pp)
        pp.set_downloader(self)
    
    def to_screen(self, message, skip_eol=False, ignore_encoding_errors=False):
        """Print message to stdout if not in quiet mode."""
        try:
            if not self.params.get('quiet', False):
                terminator = [u'\n', u''][skip_eol]
                print >>self._screen_file, (u'%s%s' % (message, terminator)).encode(preferredencoding()),
            self._screen_file.flush()
        except (UnicodeEncodeError), err:
            if not ignore_encoding_errors:
                raise
    
    def to_stderr(self, message):
        """Print message to stderr."""
        print >>sys.stderr, message.encode(preferredencoding())
        
    def fixed_template(self):
        """Checks if the output template is fixed."""
        return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)

    def trouble(self, message=None):
        """Determine action to take when a download problem appears.

        Depending on if the downloader has been configured to ignore
        download errors or not, this method may throw an exception or
        not when errors are found, after printing the message.
        """
        if message is not None:
            self.to_stderr(message)
        if not self.params.get('ignoreerrors', False):
            raise DownloadError(message)
        self._download_retcode = 1

    def slow_down(self, start_time, byte_counter):
        """Sleep if the download speed is over the rate limit."""
        rate_limit = self.params.get('ratelimit', None)
        if rate_limit is None or byte_counter == 0:
            return
        now = time.time()
        elapsed = now - start_time
        if elapsed <= 0.0:
            return
        speed = float(byte_counter) / elapsed
        if speed > rate_limit:
            time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
    
    def try_rename(self, old_filename, new_filename):
        try:
            if old_filename == new_filename:
                return
            os.rename(old_filename, new_filename)
        except (IOError, OSError), err:
            self.trouble(u'ERROR: unable to rename file')

    def report_destination(self, filename):
        """Report destination filename."""
        self.to_screen(u'[download] Destination: %s' % filename, ignore_encoding_errors=True)
    def report_progress(self, percent_str, data_len_str):
        """Report download progress."""
        if self.params.get('noprogress', False):
            return
#        self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
#                (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
        self.parentSingularThread.parentControllerThread.emit(QtCore.SIGNAL('progress_update(int, int)'), int(float(percent_str)), int(self.parentSingularThread.counter))
#        (self.parent.ui.progressBar).setValue(int(float(percent_str)))
        if (int(float(percent_str)) >= 99):
            print "Download Complete"
            #Close stds
            sys.stderr.flush()
            sys.stdout.flush()
            sys.stdin.flush()
            #Emit a signal to be captured by the controller
            self.parentSingularThread.parentControllerThread.emit(QtCore.SIGNAL('download_completed()'))
            self.parentSingularThread.parentControllerThread.emit(QtCore.SIGNAL('video_downloaded(int)'), self.parentSingularThread.parentControllerThread.videoDownloadCounter)
    def report_resuming_byte(self, resume_len):
        """Report attempt to resume at given byte."""
        self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
    
    def report_retry(self, count, retries):
        """Report retry in case of HTTP error 5xx"""
        self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
    
    def report_file_already_downloaded(self, file_name):
        """Report file has already been fully downloaded."""
        try:
            self.to_screen(u'[download] %s has already been downloaded' % file_name)
        except (UnicodeEncodeError), err:
            self.to_screen(u'[download] The file has already been downloaded')
    
    def report_unable_to_resume(self):
        """Report it was impossible to resume download."""
        self.to_screen(u'[download] Unable to resume')
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    def report_finish(self):
        """Report download finished."""
        if self.params.get('noprogress', False):
            self.to_screen(u'[download] Download completed')
        else:
            self.to_screen(u'')
    
    def increment_downloads(self):
        """Increment the ordinal that assigns a number to each file."""
        self._num_downloads += 1

    def process_info(self, info_dict, downloadpath, fileName):
        """Process a single dictionary returned by an InfoExtractor."""
        # Do nothing else if in simulate mode
        if self.params.get('simulate', False):
            # Forced printings
            if self.params.get('forcetitle', False):
                print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
            if self.params.get('forceurl', False):
                print info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace')
            if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
                print info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace')
            if self.params.get('forcedescription', False) and 'description' in info_dict:
                print info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace')

            return
            
        try:
            template_dict = dict(info_dict)
            template_dict['epoch'] = unicode(long(time.time()))
            template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
            filename = self.params['outtmpl'] % template_dict
        except (ValueError, KeyError), err:
            self.trouble(u'ERROR: invalid system charset or erroneous output template')
            return
        if self.params.get('nooverwrites', False) and os.path.exists(filename):
            self.to_stderr(u'WARNING: file exists and will be skipped')
            return

        try:
            self.pmkdir(filename)
        except (OSError, IOError), err:
            self.trouble(u'ERROR: unable to create directories: %s' % str(err))
            return

        try:
            success = self._do_download(filename, info_dict['url'].encode('utf-8'), info_dict.get('player_url', None), downloadpath, fileName)
        except (OSError, IOError), err:
            raise UnavailableVideoError
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self.trouble(u'ERROR: unable to download video data: %s' % str(err))
            return
        except (ContentTooShortError, ), err:
            self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
            return

        if success:
            try:
                self.post_process(filename, info_dict)
            except (PostProcessingError), err:
                self.trouble(u'ERROR: postprocessing: %s' % str(err))
                return

    def download(self, url_list):
        """Download a given list of URLs."""
        if len(url_list) > 1 and self.fixed_template():
            raise SameFileError(self.params['outtmpl'])

        for url in url_list:
            suitable_found = False
            for ie in self._ies:
                # Go to next InfoExtractor if not suitable
                if not ie.suitable(url):
                    continue

                # Suitable InfoExtractor found
                suitable_found = True

                # Extract information from URL and process it
                ie.extract(url)

                # Suitable InfoExtractor had been found; go to next URL
                break

            if not suitable_found:
                self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)

        return self._download_retcode

    def post_process(self, filename, ie_info):
        """Run the postprocessing chain on the given file."""
        info = dict(ie_info)
        info['filepath'] = filename
        for pp in self._pps:
            info = pp.run(info)
            if info is None:
                break
    
    def _download_with_rtmpdump(self, filename, url, player_url):
        self.report_destination(filename)
        tmpfilename = self.temp_name(filename)

        # Check for rtmpdump first
        try:
            subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
        except (OSError, IOError):
            self.trouble(u'ERROR: RTMP download detected but "rtmpdump" could not be run')
            return False

        # Download using rtmpdump. rtmpdump returns exit code 2 when
        # the connection was interrumpted and resuming appears to be
        # possible. This is part of rtmpdump's normal usage, AFAIK.
        basic_args = ['rtmpdump', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
        retval = subprocess.call(basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)])
        while retval == 2 or retval == 1:
            prevsize = os.path.getsize(tmpfilename)
            self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
            time.sleep(5.0) # This seems to be needed
            retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
            cursize = os.path.getsize(tmpfilename)
            if prevsize == cursize and retval == 1:
                break
        if retval == 0:
            self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(tmpfilename))
#            self.try_rename(tmpfilename, filename)
            return True
        else:
            self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
            return False

    def _do_download(self, filename, url, player_url, downloadPath, fileName):
        # Check file already present
        if self.params.get('continuedl', False) and os.path.isfile(filename):
            self.report_file_already_downloaded(filename)
            return True

        # Attempt to download using rtmpdump
        if url.startswith('rtmp'):
            return self._download_with_rtmpdump(filename, url, player_url)

        tmpfilename = self.temp_name(filename)
        stream = None
        open_mode = 'wb'
        basic_request = urllib2.Request(url, None, std_headers)
        request = urllib2.Request(url, None, std_headers)

        # Establish possible resume length
        if os.path.isfile(tmpfilename):
            resume_len = os.path.getsize(tmpfilename)
        else:
            resume_len = 0

        # Request parameters in case of being able to resume
        if self.params.get('continuedl', False) and resume_len != 0:
            self.report_resuming_byte(resume_len)
            request.add_header('Range','bytes=%d-' % resume_len)
            open_mode = 'ab'

        count = 0
        retries = self.params.get('retries', 0)
        while count <= retries:
            # Establish connection
            try:
                data = urllib2.urlopen(request)
                break
            except (urllib2.HTTPError, ), err:
                if (err.code < 500 or err.code >= 600) and err.code != 416:
                    # Unexpected HTTP error
                    raise
                elif err.code == 416:
                    # Unable to resume (requested range not satisfiable)
                    try:
                        # Open the connection again without the range header
                        data = urllib2.urlopen(basic_request)
                        content_length = data.info()['Content-Length']
                    except (urllib2.HTTPError, ), err:
                        if err.code < 500 or err.code >= 600:
                            raise
                    else:
                        # Examine the reported length
                        if (content_length is not None and
                            (resume_len - 100 < long(content_length) < resume_len + 100)):
                            # The file had already been fully downloaded.
                            # Explanation to the above condition: in issue #175 it was revealed that
                            # YouTube sometimes adds or removes a few bytes from the end of the file,
                            # changing the file size slightly and causing problems for some users. So
                            # I decided to implement a suggested change and consider the file
                            # completely downloaded if the file size differs less than 100 bytes from
                            # the one in the hard drive.
                            self.report_file_already_downloaded(filename)
#                            self.try_rename(tmpfilename, filename)
                            return True
                        else:
                            # The length does not match, we start the download over
                            self.report_unable_to_resume()
                            open_mode = 'wb'
                            break
            # Retry
            count += 1
            if count <= retries:
                self.report_retry(count, retries)

        if count > retries:
            self.trouble(u'ERROR: giving up after %s retries' % retries)
            return False

        data_len = data.info().get('Content-length', None)
        data_len_str = self.format_bytes(data_len)
        byte_counter = 0
        block_size = 1024
        start = time.time()
        while True:
            # Download and write
            before = time.time()
            data_block = data.read(block_size)
            after = time.time()
            data_block_len = len(data_block)
            if data_block_len == 0:
                break
            byte_counter += data_block_len
#Added By Rahul
            filename = downloadPath + "/" + fileName + ".flv";
            
            # Open file just in time
            if stream is None:
                try:
                    (stream, filename) = sanitize_open(filename, open_mode)
                    self.report_destination(filename)
                except (OSError, IOError), err:
                    self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
                    return False
            try:
                stream.write(data_block)
            except (IOError, OSError), err:
                self.trouble(u'\nERROR: unable to write data: %s' % str(err))
                return False
            block_size = self.best_block_size(after - before, data_block_len)

            # Progress message
            percent_str = self.calc_percent(byte_counter, data_len)
            #eta_str = self.calc_eta(start, time.time(), data_len, byte_counter)
#            speed_str = self.calc_speed(start, time.time(), byte_counter)
        
            #self.report_progress(percent_str, data_len_str, speed_str, eta_str)
            self.report_progress(percent_str, data_len_str)
            # Apply rate limit
            self.slow_down(start, byte_counter)

        stream.close()
        self.report_finish()
        if data_len is not None and str(byte_counter) != data_len:
            raise ContentTooShortError(byte_counter, long(data_len))
#        self.try_rename(tmpfilename, filename)
        return True

class InfoExtractor(object):
    """Information Extractor class.

    Information extractors are the classes that, given a URL, extract
    information from the video (or videos) the URL refers to. This
    information includes the real video URL, the video title and simplified
    title, author and others. The information is stored in a dictionary
    which is then passed to the FileDownloader. The FileDownloader
    processes this information possibly downloading the video to the file
    system, among other possible outcomes. The dictionaries must include
    the following fields:

    id:        Video identifier.
    url:        Final video URL.
    uploader:    Nickname of the video uploader.
    title:        Literal title.
    stitle:        Simplified title.
    ext:        Video filename extension.
    format:        Video format.
    player_url:    SWF Player URL (may be None).

    The following fields are optional. Their primary purpose is to allow
    youtube-dl to serve as the backend for a video search function, such
    as the one in youtube2mp3.  They are only used when their respective
    forced printing functions are called:

    thumbnail:    Full URL to a video thumbnail image.
    description:    One-line video description.

    Subclasses of this one should re-define the _real_initialize() and
    _real_extract() methods, as well as the suitable() static method.
    Probably, they should also be instantiated and added to the main
    downloader.
    """

    _ready = False
    _downloader = None

    def __init__(self, downloader=None):
        """Constructor. Receives an optional downloader."""
        self._ready = False
        self.set_downloader(downloader)

    @staticmethod
    def suitable(url):
        """Receives a URL and returns True if suitable for this IE."""
        return False

    def initialize(self):
        """Initializes an instance (authentication, etc)."""
        if not self._ready:
            self._real_initialize()
            self._ready = True

    def extract(self, url):
        """Extracts URL information and returns it in list of dicts."""
        self.initialize()
        return self._real_extract(url)

    def set_downloader(self, downloader):
        """Sets the downloader for this IE."""
        self._downloader = downloader
    
    def _real_initialize(self):
        """Real initialization process. Redefine in subclasses."""
        pass

    def _real_extract(self, url):
        """Real extraction process. Redefine in subclasses."""
        pass

class YoutubeIE(InfoExtractor):
    """Information extractor for youtube.com."""

    _VALID_URL = r'^((?:https?://)?(?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/(?:(?:v/)|(?:(?:watch(?:_popup)?(?:\.php)?)?(?:\?|#!?)(?:.+&)?v=))))?([0-9A-Za-z_-]+)(?(1).+)?$'
    _LANG_URL = r'http://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
    _LOGIN_URL = 'https://www.youtube.com/signup?next=/&gl=US&hl=en'
    _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
    _NETRC_MACHINE = 'youtube'
    # Listed in order of quality
    _available_formats = ['38', '37', '22', '45', '35', '34', '43', '18', '6', '5', '17', '13']
    _video_extensions = {
        '13': '3gp',
        '17': 'mp4',
        '18': 'mp4',
        '22': 'mp4',
        '37': 'mp4',
        '38': 'video', # You actually don't know if this will be MOV, AVI or whatever
        '43': 'webm',
        '45': 'webm',
    }

    @staticmethod
    def suitable(url):
        return (re.match(YoutubeIE._VALID_URL, url) is not None)

    def __init__(self, downloadPath, fileName):
        print "Download Path:", downloadPath
        self.fileName = fileName
        self.downloadPath = downloadPath
        
    def report_lang(self):
        """Report attempt to set language."""
        self._downloader.to_screen(u'[youtube] Setting language')

    def report_login(self):
        """Report attempt to log in."""
        self._downloader.to_screen(u'[youtube] Logging in')
    
    def report_age_confirmation(self):
        """Report attempt to confirm age."""
        self._downloader.to_screen(u'[youtube] Confirming age')
    
    def report_video_webpage_download(self, video_id):
        """Report attempt to download video webpage."""
        self._downloader.to_screen(u'[youtube] %s: Downloading video webpage' % video_id)
    
    def report_video_info_webpage_download(self, video_id):
        """Report attempt to download video info webpage."""
        self._downloader.to_screen(u'[youtube] %s: Downloading video info webpage' % video_id)
    
    def report_information_extraction(self, video_id):
        """Report attempt to extract video information."""
        self._downloader.to_screen(u'[youtube] %s: Extracting video information' % video_id)
    
    def report_unavailable_format(self, video_id, format):
        """Report extracted video URL."""
        self._downloader.to_screen(u'[youtube] %s: Format %s not available' % (video_id, format))
    
    def report_rtmp_download(self):
        """Indicate the download will use the RTMP protocol."""
        self._downloader.to_screen(u'[youtube] RTMP download detected')
    
    def _real_initialize(self):
        if self._downloader is None:
            return

        username = None
        password = None
        downloader_params = self._downloader.params

        # Attempt to use provided username and password or .netrc data
        if downloader_params.get('username', None) is not None:
            username = downloader_params['username']
            password = downloader_params['password']
        elif downloader_params.get('usenetrc', False):
            try:
                info = netrc.netrc().authenticators(self._NETRC_MACHINE)
                if info is not None:
                    username = info[0]
                    password = info[2]
                else:
                    raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
            except (IOError, netrc.NetrcParseError), err:
                self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % str(err))
                return

        # Set language
        request = urllib2.Request(self._LANG_URL, None, std_headers)
        try:
            self.report_lang()
            urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.to_stderr(u'WARNING: unable to set language: %s' % str(err))
            return

        # No authentication to be performed
        if username is None:
            return

        # Log in
        login_form = {
                'current_form': 'loginForm',
                'next':        '/',
                'action_login':    'Log In',
                'username':    username,
                'password':    password,
                }
        request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form), std_headers)
        try:
            self.report_login()
            login_results = urllib2.urlopen(request).read()
            if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
                self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
                return
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.to_stderr(u'WARNING: unable to log in: %s' % str(err))
            return
    
        # Confirm age
        age_form = {
                'next_url':        '/',
                'action_confirm':    'Confirm',
                }
        request = urllib2.Request(self._AGE_URL, urllib.urlencode(age_form), std_headers)
        try:
            self.report_age_confirmation()
            age_results = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % str(err))
            return

    def _real_extract(self, url):
        # Extract video id from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
            return
        video_id = mobj.group(2)

        # Get video webpage
        self.report_video_webpage_download(video_id)
        request = urllib2.Request('http://www.youtube.com/watch?v=%s&gl=US&hl=en&amp;has_verified=1' % video_id, None, std_headers)
        try:
            video_webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
            return

        # Attempt to extract SWF player URL
        mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
        if mobj is not None:
            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
        else:
            player_url = None

        # Get video info
        self.report_video_info_webpage_download(video_id)
        for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
            video_info_url = ('http://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
                       % (video_id, el_type))
            request = urllib2.Request(video_info_url, None, std_headers)
            try:
                video_info_webpage = urllib2.urlopen(request).read()
                video_info = parse_qs(video_info_webpage)
                if 'token' in video_info:
                    break
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
                return
        if 'token' not in video_info:
            if 'reason' in video_info:
                self._downloader.trouble(u'ERROR: YouTube said: %s' % video_info['reason'][0].decode('utf-8'))
            else:
                self._downloader.trouble(u'ERROR: "token" parameter not in video info for unknown reason')
            return

        # Start extracting information
        self.report_information_extraction(video_id)

        # uploader
        if 'author' not in video_info:
            self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
            return
        video_uploader = urllib.unquote_plus(video_info['author'][0])

        # title
        if 'title' not in video_info:
            self._downloader.trouble(u'ERROR: unable to extract video title')
            return
        video_title = urllib.unquote_plus(video_info['title'][0])
        video_title = video_title.decode('utf-8')
        video_title = sanitize_title(video_title)

        # simplified title
        simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
        simple_title = simple_title.strip(ur'_')

        # thumbnail image
        if 'thumbnail_url' not in video_info:
            self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
            video_thumbnail = ''
        else:    # don't panic if we can't find it
            video_thumbnail = urllib.unquote_plus(video_info['thumbnail_url'][0])

        # upload date
        upload_date = u'NA'
        mobj = re.search(r'id="eow-date".*?>(.*?)</span>', video_webpage, re.DOTALL)
        if mobj is not None:
            upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
            format_expressions = ['%d %B %Y', '%B %d %Y']
            for expression in format_expressions:
                try:
                    upload_date = datetime.datetime.strptime(upload_date, expression).strftime('%Y%m%d')
                except:
                    pass

        # description
        video_description = 'No description available.'
        if self._downloader.params.get('forcedescription', False):
            mobj = re.search(r'<meta name="description" content="(.*)"(?:\s*/)?>', video_webpage)
            if mobj is not None:
                video_description = mobj.group(1)

        # token
        video_token = urllib.unquote_plus(video_info['token'][0])

        # Decide which formats to download
        req_format = self._downloader.params.get('format', None)
        get_video_template = 'http://www.youtube.com/get_video?video_id=%s&t=%s&eurl=&el=&ps=&asv=&fmt=%%s' % (video_id, video_token)

        if 'fmt_url_map' in video_info:
            url_map = dict(tuple(pair.split('|')) for pair in video_info['fmt_url_map'][0].split(','))
            format_limit = self._downloader.params.get('format_limit', None)
            if format_limit is not None and format_limit in self._available_formats:
                format_list = self._available_formats[self._available_formats.index(format_limit):]
            else:
                format_list = self._available_formats
            existing_formats = [x for x in format_list if x in url_map]
            if len(existing_formats) == 0:
                self._downloader.trouble(u'ERROR: no known formats available for video')
                return
            if req_format is None:
                video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
            elif req_format == '-1':
                video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
            else:
                if req_format in url_map:
                    video_url_list = [(req_format, url_map[req_format])] # Specific format
                else:
                    video_url_list = [(req_format, get_video_template % req_format)] # Specific format

        elif 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
            self.report_rtmp_download()
            video_url_list = [(None, video_info['conn'][0])]

        else:
            self._downloader.trouble(u'ERROR: no fmt_url_map or conn information found in video info')
            return

        for format_param, video_real_url in video_url_list:
            # At this point we have a new video
            self._downloader.increment_downloads()

            # Extension
            video_extension = self._video_extensions.get(format_param, 'flv')

            # Find the video URL in fmt_url_map or conn paramters
            try:
                # Process video information
                self._downloader.process_info({
                    'id':        video_id.decode('utf-8'),
                    'url':        video_real_url.decode('utf-8'),
                    'uploader':    video_uploader.decode('utf-8'),
                    'upload_date':    upload_date,
                    'title':    video_title,
                    'stitle':    simple_title,
                    'ext':        video_extension.decode('utf-8'),
                    'format':    (format_param is None and u'NA' or format_param.decode('utf-8')),
                    'thumbnail':    video_thumbnail.decode('utf-8'),
                    'description':    video_description.decode('utf-8'),
                    'player_url':    player_url,
                    }, self.downloadPath, self.fileName)
            except UnavailableVideoError, err:
                self._downloader.trouble(u'ERROR: unable to download video (format may not be available)')


class MetacafeIE(InfoExtractor):
    """Information Extractor for metacafe.com."""

    _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
    _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
    _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
    _youtube_ie = None

    def __init__(self, youtube_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._youtube_ie = youtube_ie

    @staticmethod
    def suitable(url):
        return (re.match(MetacafeIE._VALID_URL, url) is not None)

    def report_disclaimer(self):
        """Report disclaimer retrieval."""
        self._downloader.to_screen(u'[metacafe] Retrieving disclaimer')

    def report_age_confirmation(self):
        """Report attempt to confirm age."""
        self._downloader.to_screen(u'[metacafe] Confirming age')
    
    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[metacafe] %s: Downloading webpage' % video_id)
    
    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[metacafe] %s: Extracting information' % video_id)

    def _real_initialize(self):
        # Retrieve disclaimer
        request = urllib2.Request(self._DISCLAIMER, None, std_headers)
        try:
            self.report_disclaimer()
            disclaimer = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable to retrieve disclaimer: %s' % str(err))
            return

        # Confirm age
        disclaimer_form = {
            'filters': '0',
            'submit': "Continue - I'm over 18",
            }
        request = urllib2.Request(self._FILTER_POST, urllib.urlencode(disclaimer_form), std_headers)
        try:
            self.report_age_confirmation()
            disclaimer = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % str(err))
            return
    
    def _real_extract(self, url):
        # Extract id and simplified title from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
            return

        video_id = mobj.group(1)

        # Check if video comes from YouTube
        mobj2 = re.match(r'^yt-(.*)$', video_id)
        if mobj2 is not None:
            self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % mobj2.group(1))
            return

        # At this point we have a new video
        self._downloader.increment_downloads()

        simple_title = mobj.group(2).decode('utf-8')

        # Retrieve video webpage to extract further information
        request = urllib2.Request('http://www.metacafe.com/watch/%s/' % video_id)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
            return

        # Extract URL, uploader and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
        if mobj is not None:
            mediaURL = urllib.unquote(mobj.group(1))
            video_extension = mediaURL[-3:]
            
            # Extract gdaKey if available
            mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
            if mobj is None:
                video_url = mediaURL
            else:
                gdaKey = mobj.group(1)
                video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
        else:
            mobj = re.search(r' name="flashvars" value="(.*?)"', webpage)
            if mobj is None:
                self._downloader.trouble(u'ERROR: unable to extract media URL')
                return
            vardict = parse_qs(mobj.group(1))
            if 'mediaData' not in vardict:
                self._downloader.trouble(u'ERROR: unable to extract media URL')
                return
            mobj = re.search(r'"mediaURL":"(http.*?)","key":"(.*?)"', vardict['mediaData'][0])
            if mobj is None:
                self._downloader.trouble(u'ERROR: unable to extract media URL')
                return
            mediaURL = mobj.group(1).replace('\\/', '/')
            video_extension = mediaURL[-3:]
            video_url = '%s?__gda__=%s' % (mediaURL, mobj.group(2))

        mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_title = mobj.group(1).decode('utf-8')
        video_title = sanitize_title(video_title)

        mobj = re.search(r'(?ms)By:\s*<a .*?>(.+?)<', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
            return
        video_uploader = mobj.group(1)

        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url.decode('utf-8'),
                'uploader':    video_uploader.decode('utf-8'),
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError:
            self._downloader.trouble(u'ERROR: unable to download video')


class DailymotionIE(InfoExtractor):
    """Information Extractor for Dailymotion"""

    _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^_/]+)_([^/]+)'

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return (re.match(DailymotionIE._VALID_URL, url) is not None)

    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[dailymotion] %s: Downloading webpage' % video_id)
    
    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[dailymotion] %s: Extracting information' % video_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url):
        # Extract id and simplified title from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
            return

        # At this point we have a new video
        self._downloader.increment_downloads()
        video_id = mobj.group(1)

        simple_title = mobj.group(2).decode('utf-8')
        video_extension = 'flv'

        # Retrieve video webpage to extract further information
        request = urllib2.Request(url)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
            return

        # Extract URL, uploader and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r'(?i)addVariable\(\"video\"\s*,\s*\"([^\"]*)\"\)', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract media URL')
            return
        mediaURL = urllib.unquote(mobj.group(1))

        # if needed add http://www.dailymotion.com/ if relative URL

        video_url = mediaURL

        # '<meta\s+name="title"\s+content="Dailymotion\s*[:\-]\s*(.*?)"\s*\/\s*>'
        mobj = re.search(r'(?im)<title>Dailymotion\s*[\-:]\s*(.+?)</title>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_title = mobj.group(1).decode('utf-8')
        video_title = sanitize_title(video_title)

        mobj = re.search(r'(?im)<div class="dmco_html owner">.*?<a class="name" href="/.+?">(.+?)</a>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
            return
        video_uploader = mobj.group(1)

        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url.decode('utf-8'),
                'uploader':    video_uploader.decode('utf-8'),
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError:
            self._downloader.trouble(u'ERROR: unable to download video')

class GoogleIE(InfoExtractor):
    """Information extractor for video.google.com."""

    _VALID_URL = r'(?:http://)?video\.google\.(?:com(?:\.au)?|co\.(?:uk|jp|kr|cr)|ca|de|es|fr|it|nl|pl)/videoplay\?docid=([^\&]+).*'

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return (re.match(GoogleIE._VALID_URL, url) is not None)

    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[video.google] %s: Downloading webpage' % video_id)

    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[video.google] %s: Extracting information' % video_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url):
        # Extract id from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        # At this point we have a new video
        self._downloader.increment_downloads()
        video_id = mobj.group(1)

        video_extension = 'mp4'

        # Retrieve video webpage to extract further information
        request = urllib2.Request('http://video.google.com/videoplay?docid=%s&hl=en&oe=utf-8' % video_id)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
            return

        # Extract URL, uploader, and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r"download_url:'([^']+)'", webpage)
        if mobj is None:
            video_extension = 'flv'
            mobj = re.search(r"(?i)videoUrl\\x3d(.+?)\\x26", webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract media URL')
            return
        mediaURL = urllib.unquote(mobj.group(1))
        mediaURL = mediaURL.replace('\\x3d', '\x3d')
        mediaURL = mediaURL.replace('\\x26', '\x26')

        video_url = mediaURL

        mobj = re.search(r'<title>(.*)</title>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_title = mobj.group(1).decode('utf-8')
        video_title = sanitize_title(video_title)
        simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)

        # Extract video description
        mobj = re.search(r'<span id=short-desc-content>([^<]*)</span>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video description')
            return
        video_description = mobj.group(1).decode('utf-8')
        if not video_description:
            video_description = 'No description available.'

        # Extract video thumbnail
        if self._downloader.params.get('forcethumbnail', False):
            request = urllib2.Request('http://video.google.com/videosearch?q=%s+site:video.google.com&hl=en' % abs(int(video_id)))
            try:
                webpage = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
                return
            mobj = re.search(r'<img class=thumbnail-img (?:.* )?src=(http.*)>', webpage)
            if mobj is None:
                self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
                return
            video_thumbnail = mobj.group(1)
        else:    # we need something to pass to process_info
            video_thumbnail = ''


        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url.decode('utf-8'),
                'uploader':    u'NA',
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError:
            self._downloader.trouble(u'ERROR: unable to download video')


class PhotobucketIE(InfoExtractor):
    """Information extractor for photobucket.com."""

    _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return (re.match(PhotobucketIE._VALID_URL, url) is not None)

    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[photobucket] %s: Downloading webpage' % video_id)

    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[photobucket] %s: Extracting information' % video_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url):
        # Extract id from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        # At this point we have a new video
        self._downloader.increment_downloads()
        video_id = mobj.group(1)

        video_extension = 'flv'

        # Retrieve video webpage to extract further information
        request = urllib2.Request(url)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
            return

        # Extract URL, uploader, and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract media URL')
            return
        mediaURL = urllib.unquote(mobj.group(1))

        video_url = mediaURL

        mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_title = mobj.group(1).decode('utf-8')
        video_title = sanitize_title(video_title)
        simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)

        video_uploader = mobj.group(2).decode('utf-8')

        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url.decode('utf-8'),
                'uploader':    video_uploader,
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError:
            self._downloader.trouble(u'ERROR: unable to download video')


class YahooIE(InfoExtractor):
    """Information extractor for video.yahoo.com."""

    # _VALID_URL matches all Yahoo! Video URLs
    # _VPAGE_URL matches only the extractable '/watch/' URLs
    _VALID_URL = r'(?:http://)?(?:[a-z]+\.)?video\.yahoo\.com/(?:watch|network)/([0-9]+)(?:/|\?v=)([0-9]+)(?:[#\?].*)?'
    _VPAGE_URL = r'(?:http://)?video\.yahoo\.com/watch/([0-9]+)/([0-9]+)(?:[#\?].*)?'

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return (re.match(YahooIE._VALID_URL, url) is not None)

    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[video.yahoo] %s: Downloading webpage' % video_id)

    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[video.yahoo] %s: Extracting information' % video_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url, new_video=True):
        # Extract ID from URL
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        # At this point we have a new video
        self._downloader.increment_downloads()
        video_id = mobj.group(2)
        video_extension = 'flv'

        # Rewrite valid but non-extractable URLs as
        # extractable English language /watch/ URLs
        if re.match(self._VPAGE_URL, url) is None:
            request = urllib2.Request(url)
            try:
                webpage = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
                return

            mobj = re.search(r'\("id", "([0-9]+)"\);', webpage)
            if mobj is None:
                self._downloader.trouble(u'ERROR: Unable to extract id field')
                return
            yahoo_id = mobj.group(1)

            mobj = re.search(r'\("vid", "([0-9]+)"\);', webpage)
            if mobj is None:
                self._downloader.trouble(u'ERROR: Unable to extract vid field')
                return
            yahoo_vid = mobj.group(1)

            url = 'http://video.yahoo.com/watch/%s/%s' % (yahoo_vid, yahoo_id)
            return self._real_extract(url, new_video=False)

        # Retrieve video webpage to extract further information
        request = urllib2.Request(url)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
            return

        # Extract uploader and title from webpage
        self.report_extraction(video_id)
        mobj = re.search(r'<meta name="title" content="(.*)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video title')
            return
        video_title = mobj.group(1).decode('utf-8')
        simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)

        mobj = re.search(r'<h2 class="ti-5"><a href="http://video\.yahoo\.com/(people|profile)/[0-9]+" beacon=".*">(.*)</a></h2>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video uploader')
            return
        video_uploader = mobj.group(1).decode('utf-8')

        # Extract video thumbnail
        mobj = re.search(r'<link rel="image_src" href="(.*)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
            return
        video_thumbnail = mobj.group(1).decode('utf-8')

        # Extract video description
        mobj = re.search(r'<meta name="description" content="(.*)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video description')
            return
        video_description = mobj.group(1).decode('utf-8')
        if not video_description: video_description = 'No description available.'

        # Extract video height and width
        mobj = re.search(r'<meta name="video_height" content="([0-9]+)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video height')
            return
        yv_video_height = mobj.group(1)

        mobj = re.search(r'<meta name="video_width" content="([0-9]+)" />', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract video width')
            return
        yv_video_width = mobj.group(1)

        # Retrieve video playlist to extract media URL
        # I'm not completely sure what all these options are, but we
        # seem to need most of them, otherwise the server sends a 401.
        yv_lg = 'R0xx6idZnW2zlrKP8xxAIR'  # not sure what this represents
        yv_bitrate = '700'  # according to Wikipedia this is hard-coded
        request = urllib2.Request('http://cosmos.bcst.yahoo.com/up/yep/process/getPlaylistFOP.php?node_id=' + video_id +
                          '&tech=flash&mode=playlist&lg=' + yv_lg + '&bitrate=' + yv_bitrate + '&vidH=' + yv_video_height +
                      '&vidW=' + yv_video_width + '&swf=as3&rd=video.yahoo.com&tk=null&adsupported=v1,v2,&eventid=1301797')
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
            return

        # Extract media URL from playlist XML
        mobj = re.search(r'<STREAM APP="(http://.*)" FULLPATH="/?(/.*\.flv\?[^"]*)"', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: Unable to extract media URL')
            return
        video_url = urllib.unquote(mobj.group(1) + mobj.group(2)).decode('utf-8')
        video_url = re.sub(r'(?u)&(.+?);', htmlentity_transform, video_url)

        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url,
                'uploader':    video_uploader,
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'thumbnail':    video_thumbnail.decode('utf-8'),
                'description':    video_description,
                'thumbnail':    video_thumbnail,
                'description':    video_description,
                'player_url':    None,
            })
        except UnavailableVideoError:
            self._downloader.trouble(u'ERROR: unable to download video')


class GenericIE(InfoExtractor):
    """Generic last-resort information extractor."""

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return True

    def report_download_webpage(self, video_id):
        """Report webpage download."""
        self._downloader.to_screen(u'WARNING: Falling back on generic information extractor.')
        self._downloader.to_screen(u'[generic] %s: Downloading webpage' % video_id)

    def report_extraction(self, video_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[generic] %s: Extracting information' % video_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url):
        # At this point we have a new video
        self._downloader.increment_downloads()

        video_id = url.split('/')[-1]
        request = urllib2.Request(url)
        try:
            self.report_download_webpage(video_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
            return
        except ValueError, err:
            # since this is the last-resort InfoExtractor, if
            # this error is thrown, it'll be thrown here
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        self.report_extraction(video_id)
        # Start with something easy: JW Player in SWFObject
        mobj = re.search(r'flashvars: [\'"](?:.*&)?file=(http[^\'"&]*)', webpage)
        if mobj is None:
            # Broaden the search a little bit
            mobj = re.search(r'[^A-Za-z0-9]?(?:file|source)=(http[^\'"&]*)', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        # It's possible that one of the regexes
        # matched, but returned an empty group:
        if mobj.group(1) is None:
            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
            return

        video_url = urllib.unquote(mobj.group(1))
        video_id  = os.path.basename(video_url)

        # here's a fun little line of code for you:
        video_extension = os.path.splitext(video_id)[1][1:]
        video_id        = os.path.splitext(video_id)[0]

        # it's tempting to parse this further, but you would
        # have to take into account all the variations like
        #   Video Title - Site Name
        #   Site Name | Video Title
        #   Video Title - Tagline | Site Name
        # and so on and so forth; it's just not practical
        mobj = re.search(r'<title>(.*)</title>', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_title = mobj.group(1).decode('utf-8')
        video_title = sanitize_title(video_title)
        simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)

        # video uploader is domain name
        mobj = re.match(r'(?:https?://)?([^/]*)/.*', url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        video_uploader = mobj.group(1).decode('utf-8')

        try:
            # Process video information
            self._downloader.process_info({
                'id':        video_id.decode('utf-8'),
                'url':        video_url.decode('utf-8'),
                'uploader':    video_uploader,
                'upload_date':    u'NA',
                'title':    video_title,
                'stitle':    simple_title,
                'ext':        video_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError, err:
            self._downloader.trouble(u'ERROR: unable to download video')


class YoutubeSearchIE(InfoExtractor):
    """Information Extractor for YouTube search queries."""
    _VALID_QUERY = r'ytsearch(\d+|all)?:[\s\S]+'
    _TEMPLATE_URL = 'http://www.youtube.com/results?search_query=%s&page=%s&gl=US&hl=en'
    _VIDEO_INDICATOR = r'href="/watch\?v=.+?"'
    _MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
    _youtube_ie = None
    _max_youtube_results = 1000

    def __init__(self, youtube_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._youtube_ie = youtube_ie
    
    @staticmethod
    def suitable(url):
        return (re.match(YoutubeSearchIE._VALID_QUERY, url) is not None)

    def report_download_page(self, query, pagenum):
        """Report attempt to download playlist page with given number."""
        query = query.decode(preferredencoding())
        self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))

    def _real_initialize(self):
        self._youtube_ie.initialize()
    
    def _real_extract(self, query):
        mobj = re.match(self._VALID_QUERY, query)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
            return

        prefix, query = query.split(':')
        prefix = prefix[8:]
        query  = query.encode('utf-8')
        if prefix == '':
            self._download_n_results(query, 1)
            return
        elif prefix == 'all':
            self._download_n_results(query, self._max_youtube_results)
            return
        else:
            try:
                n = long(prefix)
                if n <= 0:
                    self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
                    return
                elif n > self._max_youtube_results:
                    self._downloader.to_stderr(u'WARNING: ytsearch returns max %i results (you requested %i)'  % (self._max_youtube_results, n))
                    n = self._max_youtube_results
                self._download_n_results(query, n)
                return
            except ValueError: # parsing prefix as integer fails
                self._download_n_results(query, 1)
                return

    def _download_n_results(self, query, n):
        """Downloads a specified number of results for a query"""

        video_ids = []
        already_seen = set()
        pagenum = 1

        while True:
            self.report_download_page(query, pagenum)
            result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
            request = urllib2.Request(result_url, None, std_headers)
            try:
                page = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
                return

            # Extract video identifiers
            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
                video_id = page[mobj.span()[0]:mobj.span()[1]].split('=')[2][:-1]
                if video_id not in already_seen:
                    video_ids.append(video_id)
                    already_seen.add(video_id)
                    if len(video_ids) == n:
                        # Specified n videos reached
                        for id in video_ids:
                            self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
                        return

            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
                for id in video_ids:
                    self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
                return

            pagenum = pagenum + 1

class GoogleSearchIE(InfoExtractor):
    """Information Extractor for Google Video search queries."""
    _VALID_QUERY = r'gvsearch(\d+|all)?:[\s\S]+'
    _TEMPLATE_URL = 'http://video.google.com/videosearch?q=%s+site:video.google.com&start=%s&hl=en'
    _VIDEO_INDICATOR = r'videoplay\?docid=([^\&>]+)\&'
    _MORE_PAGES_INDICATOR = r'<span>Next</span>'
    _google_ie = None
    _max_google_results = 1000

    def __init__(self, google_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._google_ie = google_ie
    
    @staticmethod
    def suitable(url):
        return (re.match(GoogleSearchIE._VALID_QUERY, url) is not None)

    def report_download_page(self, query, pagenum):
        """Report attempt to download playlist page with given number."""
        query = query.decode(preferredencoding())
        self._downloader.to_screen(u'[video.google] query "%s": Downloading page %s' % (query, pagenum))

    def _real_initialize(self):
        self._google_ie.initialize()
    
    def _real_extract(self, query):
        mobj = re.match(self._VALID_QUERY, query)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
            return

        prefix, query = query.split(':')
        prefix = prefix[8:]
        query  = query.encode('utf-8')
        if prefix == '':
            self._download_n_results(query, 1)
            return
        elif prefix == 'all':
            self._download_n_results(query, self._max_google_results)
            return
        else:
            try:
                n = long(prefix)
                if n <= 0:
                    self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
                    return
                elif n > self._max_google_results:
                    self._downloader.to_stderr(u'WARNING: gvsearch returns max %i results (you requested %i)'  % (self._max_google_results, n))
                    n = self._max_google_results
                self._download_n_results(query, n)
                return
            except ValueError: # parsing prefix as integer fails
                self._download_n_results(query, 1)
                return

    def _download_n_results(self, query, n):
        """Downloads a specified number of results for a query"""

        video_ids = []
        already_seen = set()
        pagenum = 1

        while True:
            self.report_download_page(query, pagenum)
            result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
            request = urllib2.Request(result_url, None, std_headers)
            try:
                page = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
                return

            # Extract video identifiers
            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
                video_id = mobj.group(1)
                if video_id not in already_seen:
                    video_ids.append(video_id)
                    already_seen.add(video_id)
                    if len(video_ids) == n:
                        # Specified n videos reached
                        for id in video_ids:
                            self._google_ie.extract('http://video.google.com/videoplay?docid=%s' % id)
                        return

            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
                for id in video_ids:
                    self._google_ie.extract('http://video.google.com/videoplay?docid=%s' % id)
                return

            pagenum = pagenum + 1

class YahooSearchIE(InfoExtractor):
    """Information Extractor for Yahoo! Video search queries."""
    _VALID_QUERY = r'yvsearch(\d+|all)?:[\s\S]+'
    _TEMPLATE_URL = 'http://video.yahoo.com/search/?p=%s&o=%s'
    _VIDEO_INDICATOR = r'href="http://video\.yahoo\.com/watch/([0-9]+/[0-9]+)"'
    _MORE_PAGES_INDICATOR = r'\s*Next'
    _yahoo_ie = None
    _max_yahoo_results = 1000

    def __init__(self, yahoo_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._yahoo_ie = yahoo_ie
    
    @staticmethod
    def suitable(url):
        return (re.match(YahooSearchIE._VALID_QUERY, url) is not None)

    def report_download_page(self, query, pagenum):
        """Report attempt to download playlist page with given number."""
        query = query.decode(preferredencoding())
        self._downloader.to_screen(u'[video.yahoo] query "%s": Downloading page %s' % (query, pagenum))

    def _real_initialize(self):
        self._yahoo_ie.initialize()
    
    def _real_extract(self, query):
        mobj = re.match(self._VALID_QUERY, query)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
            return

        prefix, query = query.split(':')
        prefix = prefix[8:]
        query  = query.encode('utf-8')
        if prefix == '':
            self._download_n_results(query, 1)
            return
        elif prefix == 'all':
            self._download_n_results(query, self._max_yahoo_results)
            return
        else:
            try:
                n = long(prefix)
                if n <= 0:
                    self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
                    return
                elif n > self._max_yahoo_results:
                    self._downloader.to_stderr(u'WARNING: yvsearch returns max %i results (you requested %i)'  % (self._max_yahoo_results, n))
                    n = self._max_yahoo_results
                self._download_n_results(query, n)
                return
            except ValueError: # parsing prefix as integer fails
                self._download_n_results(query, 1)
                return

    def _download_n_results(self, query, n):
        """Downloads a specified number of results for a query"""

        video_ids = []
        already_seen = set()
        pagenum = 1

        while True:
            self.report_download_page(query, pagenum)
            result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
            request = urllib2.Request(result_url, None, std_headers)
            try:
                page = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
                return

            # Extract video identifiers
            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
                video_id = mobj.group(1)
                if video_id not in already_seen:
                    video_ids.append(video_id)
                    already_seen.add(video_id)
                    if len(video_ids) == n:
                        # Specified n videos reached
                        for id in video_ids:
                            self._yahoo_ie.extract('http://video.yahoo.com/watch/%s' % id)
                        return

            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
                for id in video_ids:
                    self._yahoo_ie.extract('http://video.yahoo.com/watch/%s' % id)
                return

            pagenum = pagenum + 1

class YoutubePlaylistIE(InfoExtractor):
    """Information Extractor for YouTube playlists."""

    _VALID_URL = r'(?:http://)?(?:\w+\.)?youtube.com/(?:(?:view_play_list|my_playlists)\?.*?p=|user/.*?/user/)([^&]+).*'
    _TEMPLATE_URL = 'http://www.youtube.com/view_play_list?p=%s&page=%s&gl=US&hl=en'
    _VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
    _MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
    _youtube_ie = None

    def __init__(self, youtube_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._youtube_ie = youtube_ie
    
    @staticmethod
    def suitable(url):
        return (re.match(YoutubePlaylistIE._VALID_URL, url) is not None)

    def report_download_page(self, playlist_id, pagenum):
        """Report attempt to download playlist page with given number."""
        self._downloader.to_screen(u'[youtube] PL %s: Downloading page #%s' % (playlist_id, pagenum))

    def _real_initialize(self):
        self._youtube_ie.initialize()
    
    def _real_extract(self, url):
        # Extract playlist id
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid url: %s' % url)
            return

        # Download playlist pages
        playlist_id = mobj.group(1)
        video_ids = []
        pagenum = 1

        while True:
            self.report_download_page(playlist_id, pagenum)
            request = urllib2.Request(self._TEMPLATE_URL % (playlist_id, pagenum), None, std_headers)
            try:
                page = urllib2.urlopen(request).read()
            except (urllib2.URLError, httplib.HTTPException, socket.error), err:
                self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
                return

            # Extract video identifiers
            ids_in_page = []
            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
                if mobj.group(1) not in ids_in_page:
                    ids_in_page.append(mobj.group(1))
            video_ids.extend(ids_in_page)

            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
                break
            pagenum = pagenum + 1

        playliststart = self._downloader.params.get('playliststart', 1) - 1
        playlistend = self._downloader.params.get('playlistend', -1)
        video_ids = video_ids[playliststart:playlistend]

        for id in video_ids:
            self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
        return

class YoutubeUserIE(InfoExtractor):
    """Information Extractor for YouTube users."""

    _VALID_URL = r'(?:http://)?(?:\w+\.)?youtube.com/user/(.*)'
    _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
    _VIDEO_INDICATOR = r'http://gdata.youtube.com/feeds/api/videos/(.*)' # XXX Fix this.
    _youtube_ie = None

    def __init__(self, youtube_ie, downloader=None):
        InfoExtractor.__init__(self, downloader)
        self._youtube_ie = youtube_ie
    
    @staticmethod
    def suitable(url):
        return (re.match(YoutubeUserIE._VALID_URL, url) is not None)

    def report_download_page(self, username):
        """Report attempt to download user page."""
        self._downloader.to_screen(u'[youtube] user %s: Downloading page ' % (username))

    def _real_initialize(self):
        self._youtube_ie.initialize()
    
    def _real_extract(self, url):
        # Extract username
        mobj = re.match(self._VALID_URL, url)
        if mobj is None:
            self._downloader.trouble(u'ERROR: invalid url: %s' % url)
            return

        # Download user page
        username = mobj.group(1)
        video_ids = []
        pagenum = 1

        self.report_download_page(username)
        request = urllib2.Request(self._TEMPLATE_URL % (username), None, std_headers)
        try:
            page = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
            return

        # Extract video identifiers
        ids_in_page = []

        for mobj in re.finditer(self._VIDEO_INDICATOR, page):
            if mobj.group(1) not in ids_in_page:
                ids_in_page.append(mobj.group(1))
        video_ids.extend(ids_in_page)

        playliststart = self._downloader.params.get('playliststart', 1) - 1
        playlistend = self._downloader.params.get('playlistend', -1)
        video_ids = video_ids[playliststart:playlistend]

        for id in video_ids:
            self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
        return

class DepositFilesIE(InfoExtractor):
    """Information extractor for depositfiles.com"""

    _VALID_URL = r'(?:http://)?(?:\w+\.)?depositfiles.com/(?:../(?#locale))?files/(.+)'

    def __init__(self, downloader=None):
        InfoExtractor.__init__(self, downloader)

    @staticmethod
    def suitable(url):
        return (re.match(DepositFilesIE._VALID_URL, url) is not None)

    def report_download_webpage(self, file_id):
        """Report webpage download."""
        self._downloader.to_screen(u'[DepositFiles] %s: Downloading webpage' % file_id)

    def report_extraction(self, file_id):
        """Report information extraction."""
        self._downloader.to_screen(u'[DepositFiles] %s: Extracting information' % file_id)

    def _real_initialize(self):
        return

    def _real_extract(self, url):
        # At this point we have a new file
        self._downloader.increment_downloads()

        file_id = url.split('/')[-1]
        # Rebuild url in english locale
        url = 'http://depositfiles.com/en/files/' + file_id

        # Retrieve file webpage with 'Free download' button pressed
        free_download_indication = { 'gateway_result' : '1' }
        request = urllib2.Request(url, urllib.urlencode(free_download_indication), std_headers)
        try:
            self.report_download_webpage(file_id)
            webpage = urllib2.urlopen(request).read()
        except (urllib2.URLError, httplib.HTTPException, socket.error), err:
            self._downloader.trouble(u'ERROR: Unable to retrieve file webpage: %s' % str(err))
            return

        # Search for the real file URL
        mobj = re.search(r'<form action="(http://fileshare.+?)"', webpage)
        if (mobj is None) or (mobj.group(1) is None):
            # Try to figure out reason of the error.
            mobj = re.search(r'<strong>(Attention.*?)</strong>', webpage, re.DOTALL)
            if (mobj is not None) and (mobj.group(1) is not None):
                restriction_message = re.sub('\s+', ' ', mobj.group(1)).strip()
                self._downloader.trouble(u'ERROR: %s' % restriction_message)
            else:
                self._downloader.trouble(u'ERROR: unable to extract download URL from: %s' % url)
            return

        file_url = mobj.group(1)
        file_extension = os.path.splitext(file_url)[1][1:]

        # Search for file title
        mobj = re.search(r'<b title="(.*?)">', webpage)
        if mobj is None:
            self._downloader.trouble(u'ERROR: unable to extract title')
            return
        file_title = mobj.group(1).decode('utf-8')

        try:
            # Process file information
            self._downloader.process_info({
                'id':        file_id.decode('utf-8'),
                'url':        file_url.decode('utf-8'),
                'uploader':    u'NA',
                'upload_date':    u'NA',
                'title':    file_title,
                'stitle':    file_title,
                'ext':        file_extension.decode('utf-8'),
                'format':    u'NA',
                'player_url':    None,
            })
        except UnavailableVideoError, err:
            self._downloader.trouble(u'ERROR: unable to download file')

class PostProcessor(object):
    """Post Processor class.

    PostProcessor objects can be added to downloaders with their
    add_post_processor() method. When the downloader has finished a
    successful download, it will take its internal chain of PostProcessors
    and start calling the run() method on each one of them, first with
    an initial argument and then with the returned value of the previous
    PostProcessor.

    The chain will be stopped if one of them ever returns None or the end
    of the chain is reached.

    PostProcessor objects follow a "mutual registration" process similar
    to InfoExtractor objects.
    """

    _downloader = None

    def __init__(self, downloader=None):
        self._downloader = downloader

    def set_downloader(self, downloader):
        """Sets the downloader for this PP."""
        self._downloader = downloader
    
    def run(self, information):
        """Run the PostProcessor.

        The "information" argument is a dictionary like the ones
        composed by InfoExtractors. The only difference is that this
        one has an extra field called "filepath" that points to the
        downloaded file.

        When this method returns None, the postprocessing chain is
        stopped. However, this method may return an information
        dictionary that will be passed to the next postprocessing
        object in the chain. It can be the one it received after
        changing some fields.

        In addition, this method may raise a PostProcessingError
        exception that will be taken into account by the downloader
        it was called from.
        """
        return information # by default, do nothing
    
### MAIN PROGRAM ###
from PyQt4.QtCore import QThread
class NewDownloader(QThread):
    def __init__(self, parent, videoList):

        QThread.__init__(self, parent)
#        threading.Thread.__init__(self) # Call the Parent constructor
        self.parent = parent # Store the reference of the class that created me
        self.urlListWithTitles = videoList
        self.tempUrlListing=[]
        self.tempTitleListing=[]
        self.downloadPath=''
        self.numberOfVideos = len(self.urlListWithTitles)
        #Check if Search keyword is enabled
        if parent.ui.lineEdit.isEnabled() == True:
            self.searchText = str(parent.ui.lineEdit.text())
        else:
            self.searchText = ''
        self.createFolderForFiles()
        for k, v in self.urlListWithTitles.items():
            self.tempUrlListing.append(v);
            self.tempTitleListing.append(k)    
    def createFolderForFiles(self):
        
         # Create a directory to store downloaded videos
         try:
             if self.searchText != '':
                 self.downloadPath = self.parent.getLibraryPath() + "/" + self.searchText
             elif self.parent.ui.comboBox.currentText() != 'Select One ...':
                 self.downloadPath = self.parent.getLibraryPath() + "/" + str(self.parent.ui.comboBox.currentText())
             else:
                 self.downloadPath = self.parent.getLibraryPath() + "/" + "Direct Downloads"
             os.makedirs(self.downloadPath)
         except OSError:
             pass
    def run(self):
        
        #Extract all the urls stored as key and their titles
        tempUrlListing = []
        tempTitleListing = []
        titlesCounter = 0
        self.videoDownloadCounter = 0
        
        #Now loop for every URL
        for urlListing2 in self.tempUrlListing:
            #Create a new item toactive downloads
            self.emit(QtCore.SIGNAL('add_item_to_active_downloads(QString)'),self.tempTitleListing[self.videoDownloadCounter]) 

            # Create a new thread            

            thread = SingularThread(self,urlListing2,self.tempTitleListing[self.videoDownloadCounter],self.videoDownloadCounter)
            thread.start()
            self.videoDownloadCounter = self.videoDownloadCounter + 1
#            print 'Now downloading url:', urlListing2
#            self.videoDownloadCounter = self.videoDownloadCounter + 1
#            try:
#                # Modules needed only when running the main program
#                import getpass
#                import optparse
#        
#                # Function to update the program file with the latest version from bitbucket.org
#                def update_self(downloader, filename):
#                    # Note: downloader only used for options
#                    if not os.access (filename, os.W_OK):
#                        sys.exit('ERROR: no write permissions on %s' % filename)
#        
#                    downloader.to_screen('Updating to latest stable version...')
#                    latest_url = 'http://github.com/rg3/youtube-dl/raw/master/LATEST_VERSION'
#                    latest_version = urllib.urlopen(latest_url).read().strip()
#                    prog_url = 'http://github.com/rg3/youtube-dl/raw/%s/youtube-dl' % latest_version
#                    newcontent = urllib.urlopen(prog_url).read()
#                    stream = open(filename, 'w')
#                    stream.write(newcontent)
#                    stream.close()
#                    downloader.to_screen('Updated to version %s' % latest_version)
#        
#                # Parse command line
#                parser = optparse.OptionParser(
#                    usage='Usage: %prog [options] url...',
#                    version='2010.12.09',
#                    conflict_handler='resolve',
#                )
#        
#                parser.add_option('-h', '--help',
#                        action='help', help='print this help text and exit')
#                parser.add_option('-v', '--version',
#                        action='version', help='print program version and exit')
#                parser.add_option('-U', '--update',
#                        action='store_true', dest='update_self', help='update this program to latest stable version')
#                parser.add_option('-i', '--ignore-errors',
#                        action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
#                parser.add_option('-r', '--rate-limit',
#                        dest='ratelimit', metavar='LIMIT', help='download rate limit (e.g. 50k or 44.6m)')
#                parser.add_option('-R', '--retries',
#                        dest='retries', metavar='RETRIES', help='number of retries (default is 10)', default=10)
#                parser.add_option('--playlist-start',
#                        dest='playliststart', metavar='NUMBER', help='playlist video to start at (default is 1)', default=1)
#                parser.add_option('--playlist-end',
#                        dest='playlistend', metavar='NUMBER', help='playlist video to end at (default is last)', default=-1)
#        
#                authentication = optparse.OptionGroup(parser, 'Authentication Options')
#                authentication.add_option('-u', '--username',
#                        dest='username', metavar='USERNAME', help='account username')
#                authentication.add_option('-p', '--password',
#                        dest='password', metavar='PASSWORD', help='account password')
#                authentication.add_option('-n', '--netrc',
#                        action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
#                parser.add_option_group(authentication)
#        
#                video_format = optparse.OptionGroup(parser, 'Video Format Options')
#                video_format.add_option('-f', '--format',
#                        action='store', dest='format', metavar='FORMAT', help='video format code')
#                video_format.add_option('-m', '--mobile-version',
#                        action='store_const', dest='format', help='alias for -f 17', const='17')
#                video_format.add_option('--all-formats',
#                        action='store_const', dest='format', help='download all available video formats', const='-1')
#                video_format.add_option('--max-quality',
#                        action='store', dest='format_limit', metavar='FORMAT', help='highest quality format to download')
#                video_format.add_option('-b', '--best-quality',
#                        action='store_true', dest='bestquality', help='download the best video quality (DEPRECATED)')
#                parser.add_option_group(video_format)
#        
#                verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
#                verbosity.add_option('-q', '--quiet',
#                        action='store_true', dest='quiet', help='activates quiet mode', default=False)
#                verbosity.add_option('-s', '--simulate',
#                        action='store_true', dest='simulate', help='do not download video', default=False)
#                verbosity.add_option('-g', '--get-url',
#                        action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
#                verbosity.add_option('-e', '--get-title',
#                        action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
#                verbosity.add_option('--get-thumbnail',
#                        action='store_true', dest='getthumbnail', help='simulate, quiet but print thumbnail URL', default=False)
#                verbosity.add_option('--get-description',
#                        action='store_true', dest='getdescription', help='simulate, quiet but print video description', default=False)
#                verbosity.add_option('--no-progress',
#                        action='store_true', dest='noprogress', help='do not print progress bar', default=False)
#                parser.add_option_group(verbosity)
#        
#                filesystem = optparse.OptionGroup(parser, 'Filesystem Options')
#                filesystem.add_option('-t', '--title',
#                        action='store_true', dest='usetitle', help='use title in file name', default=False)
#                filesystem.add_option('-l', '--literal',
#                        action='store_true', dest='useliteral', help='use literal title in file name', default=False)
#                filesystem.add_option('-A', '--auto-number',
#                        action='store_true', dest='autonumber', help='number downloaded files starting from 00000', default=False)
#                filesystem.add_option('-o', '--output',
#                        dest='outtmpl', metavar='TEMPLATE', help='output filename template')
#                filesystem.add_option('-a', '--batch-file',
#                        dest='batchfile', metavar='FILE', help='file containing URLs to download (\'-\' for stdin)')
#                filesystem.add_option('-w', '--no-overwrites',
#                        action='store_true', dest='nooverwrites', help='do not overwrite files', default=False)
#                filesystem.add_option('-c', '--continue',
#                        action='store_true', dest='continue_dl', help='resume partially downloaded files', default=False)
#                filesystem.add_option('--cookies',
#                        dest='cookiefile', metavar='FILE', help='file to dump cookie jar to')
#                parser.add_option_group(filesystem)
#        
#                (opts, args) = parser.parse_args()
#        
#                # Open appropriate CookieJar
#                if opts.cookiefile is None:
#                    jar = cookielib.CookieJar()
#                else:
#                    try:
#                        jar = cookielib.MozillaCookieJar(opts.cookiefile)
#                        if os.path.isfile(opts.cookiefile) and os.access(opts.cookiefile, os.R_OK):
#                            jar.load()
#                    except (IOError, OSError), err:
#                        sys.exit(u'ERROR: unable to open cookie file')
#        
#                # General configuration
#                cookie_processor = urllib2.HTTPCookieProcessor(jar)
#                urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
#                urllib2.install_opener(urllib2.build_opener(cookie_processor))
#                socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
#        
#                # Batch file verification
#                batchurls = []
#                if opts.batchfile is not None:
#                    try:
#                        if opts.batchfile == '-':
#                            batchfd = sys.stdin
#                        else:
#                            batchfd = open(opts.batchfile, 'r')
#                        batchurls = batchfd.readlines()
#                        batchurls = [x.strip() for x in batchurls]
#                        batchurls = [x for x in batchurls if len(x) > 0 and not re.search(r'^[#/;]', x)]
#                    except IOError:
#                        sys.exit(u'ERROR: batch file could not be read')
#                urlListing = []
#                urlListing.append(urlListing2)
#                all_urls = urlListing + args
#        
#                # Conflicting, missing and erroneous options
#                if opts.bestquality:
#                    print >>sys.stderr, u'\nWARNING: -b/--best-quality IS DEPRECATED AS IT IS THE DEFAULT BEHAVIOR NOW\n'
#                if opts.usenetrc and (opts.username is not None or opts.password is not None):
#                    parser.error(u'using .netrc conflicts with giving username/password')
#                if opts.password is not None and opts.username is None:
#                    parser.error(u'account username missing')
#                if opts.outtmpl is not None and (opts.useliteral or opts.usetitle or opts.autonumber):
#                    parser.error(u'using output template conflicts with using title, literal title or auto number')
#                if opts.usetitle and opts.useliteral:
#                    parser.error(u'using title conflicts with using literal title')
#                if opts.username is not None and opts.password is None:
#                    opts.password = getpass.getpass(u'Type account password and press return:')
#                if opts.ratelimit is not None:
#                    numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
#                    if numeric_limit is None:
#                        parser.error(u'invalid rate limit specified')
#                    opts.ratelimit = numeric_limit
#                if opts.retries is not None:
#                    try:
#                        opts.retries = long(opts.retries)
#                    except (TypeError, ValueError), err:
#                        parser.error(u'invalid retry count specified')
#                try:
#                    opts.playliststart = long(opts.playliststart)
#                    if opts.playliststart <= 0:
#                        raise ValueError
#                except (TypeError, ValueError), err:
#                    parser.error(u'invalid playlist start number specified')
#                try:
#                    opts.playlistend = long(opts.playlistend)
#                    if opts.playlistend != -1 and (opts.playlistend <= 0 or opts.playlistend < opts.playliststart):
#                        raise ValueError
#                except (TypeError, ValueError), err:
#                    parser.error(u'invalid playlist end number specified')
#        
#                # Information extractors
#                youtube_ie = YoutubeIE(self.downloadPath, tempTitleListing[titlesCounter]) ###FIXME - make it work for more thann one titles
#                metacafe_ie = MetacafeIE(youtube_ie)
#                dailymotion_ie = DailymotionIE()
#                youtube_pl_ie = YoutubePlaylistIE(youtube_ie)
#                youtube_user_ie = YoutubeUserIE(youtube_ie)
#                youtube_search_ie = YoutubeSearchIE(youtube_ie)
#                google_ie = GoogleIE()
#                google_search_ie = GoogleSearchIE(google_ie)
#                photobucket_ie = PhotobucketIE()
#                yahoo_ie = YahooIE()
#                yahoo_search_ie = YahooSearchIE(yahoo_ie)
#                deposit_files_ie = DepositFilesIE()
#                generic_ie = GenericIE()
#                #increment the counter
#                titlesCounter = titlesCounter + 1
#        
#                # File downloader
#                fd = FileDownloader({
#                    'usenetrc': opts.usenetrc,
#                    'username': opts.username,
#                    'password': opts.password,
#                    'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription),
#                    'forceurl': opts.geturl,
#                    'forcetitle': opts.gettitle,
#                    'forcethumbnail': opts.getthumbnail,
#                    'forcedescription': opts.getdescription,
#                    'simulate': (opts.simulate or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription),
#                    'format': opts.format,
#                    'format_limit': opts.format_limit,
#                    'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(preferredencoding()))
#                        or (opts.format == '-1' and opts.usetitle and u'%(stitle)s-%(id)s-%(format)s.%(ext)s')
#                        or (opts.format == '-1' and opts.useliteral and u'%(title)s-%(id)s-%(format)s.%(ext)s')
#                        or (opts.format == '-1' and u'%(id)s-%(format)s.%(ext)s')
#                        or (opts.usetitle and opts.autonumber and u'%(autonumber)s-%(stitle)s-%(id)s.%(ext)s')
#                        or (opts.useliteral and opts.autonumber and u'%(autonumber)s-%(title)s-%(id)s.%(ext)s')
#                        or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
#                        or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
#                        or (opts.autonumber and u'%(autonumber)s-%(id)s.%(ext)s')
#                        or u'%(id)s.%(ext)s'),
#                    'ignoreerrors': opts.ignoreerrors,
#                    'ratelimit': opts.ratelimit,
#                    'nooverwrites': opts.nooverwrites,
#                    'retries': opts.retries,
#                    'continuedl': opts.continue_dl,
#                    'noprogress': opts.noprogress,
#                    'playliststart': opts.playliststart,
#                    'playlistend': opts.playlistend,
#                    'logtostderr': opts.outtmpl == '-',
#                    }, self)
#                fd.add_info_extractor(youtube_search_ie)
#                fd.add_info_extractor(youtube_pl_ie)
#                fd.add_info_extractor(youtube_user_ie)
#                fd.add_info_extractor(metacafe_ie)
#                fd.add_info_extractor(dailymotion_ie)
#                fd.add_info_extractor(youtube_ie)
#                fd.add_info_extractor(google_ie)
#                fd.add_info_extractor(google_search_ie)
#                fd.add_info_extractor(photobucket_ie)
#                fd.add_info_extractor(yahoo_ie)
#                fd.add_info_extractor(yahoo_search_ie)
#                fd.add_info_extractor(deposit_files_ie)
#        
#                # This must come last since it's the
#                # fallback if none of the others work
#                fd.add_info_extractor(generic_ie)
#        
#                # Update version
#                if opts.update_self:
#                    update_self(fd, sys.argv[0])
#        
#                # Maybe do nothing
#                #if len(all_urls) < 1:
#                 #   if not opts.update_self:
#                  #      parser.error(u'you must provide at least one URL')
#                   # else:
#                    #    sys.exit()
#                retcode = fd.download(all_urls)
#        
#                # Dump cookie jar if requested
#                if opts.cookiefile is not None:
#                    try:
#                        jar.save()
#                    except (IOError, OSError), err:
#                        sys.exit(u'ERROR: unable to save cookie jar')
#        
##                sys.exit(retcode)
#        
#            except DownloadError:
#                sys.exit(1)
#            except SameFileError:
#                sys.exit(u'ERROR: fixed output name but more than one file to download')
#            except KeyboardInterrupt:
#                sys.exit(u'\nERROR: Interrupted by user')
from PyQt4.QtCore import QThread                
class SingularThread(QtCore.QThread):
    '''
    classdocs
    '''


    def __init__(self, parent, url, title,counter):

        QThread.__init__(self, parent)
        self.parentControllerThread = parent
        self.urlListing2 = url
        self.counter = counter
        self.title = title
    def run(self):
            print 'Now downloading url:', self.urlListing2
#            self.videoDownloadCounter = self.videoDownloadCounter + 1
            try:
                # Modules needed only when running the main program
                import getpass
                import optparse
        
                # Function to update the program file with the latest version from bitbucket.org
                def update_self(downloader, filename):
                    # Note: downloader only used for options
                    if not os.access (filename, os.W_OK):
                        sys.exit('ERROR: no write permissions on %s' % filename)
        
                    downloader.to_screen('Updating to latest stable version...')
                    latest_url = 'http://github.com/rg3/youtube-dl/raw/master/LATEST_VERSION'
                    latest_version = urllib.urlopen(latest_url).read().strip()
                    prog_url = 'http://github.com/rg3/youtube-dl/raw/%s/youtube-dl' % latest_version
                    newcontent = urllib.urlopen(prog_url).read()
                    stream = open(filename, 'w')
                    stream.write(newcontent)
                    stream.close()
                    downloader.to_screen('Updated to version %s' % latest_version)
        
                # Parse command line
                parser = optparse.OptionParser(
                    usage='Usage: %prog [options] url...',
                    version='2010.12.09',
                    conflict_handler='resolve',
                )
        
                parser.add_option('-h', '--help',
                        action='help', help='print this help text and exit')
                parser.add_option('-v', '--version',
                        action='version', help='print program version and exit')
                parser.add_option('-U', '--update',
                        action='store_true', dest='update_self', help='update this program to latest stable version')
                parser.add_option('-i', '--ignore-errors',
                        action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
                parser.add_option('-r', '--rate-limit',
                        dest='ratelimit', metavar='LIMIT', help='download rate limit (e.g. 50k or 44.6m)')
                parser.add_option('-R', '--retries',
                        dest='retries', metavar='RETRIES', help='number of retries (default is 10)', default=10)
                parser.add_option('--playlist-start',
                        dest='playliststart', metavar='NUMBER', help='playlist video to start at (default is 1)', default=1)
                parser.add_option('--playlist-end',
                        dest='playlistend', metavar='NUMBER', help='playlist video to end at (default is last)', default=-1)
        
                authentication = optparse.OptionGroup(parser, 'Authentication Options')
                authentication.add_option('-u', '--username',
                        dest='username', metavar='USERNAME', help='account username')
                authentication.add_option('-p', '--password',
                        dest='password', metavar='PASSWORD', help='account password')
                authentication.add_option('-n', '--netrc',
                        action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
                parser.add_option_group(authentication)
        
                video_format = optparse.OptionGroup(parser, 'Video Format Options')
                video_format.add_option('-f', '--format',
                        action='store', dest='format', metavar='FORMAT', help='video format code')
                video_format.add_option('-m', '--mobile-version',
                        action='store_const', dest='format', help='alias for -f 17', const='17')
                video_format.add_option('--all-formats',
                        action='store_const', dest='format', help='download all available video formats', const='-1')
                video_format.add_option('--max-quality',
                        action='store', dest='format_limit', metavar='FORMAT', help='highest quality format to download')
                video_format.add_option('-b', '--best-quality',
                        action='store_true', dest='bestquality', help='download the best video quality (DEPRECATED)')
                parser.add_option_group(video_format)
        
                verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
                verbosity.add_option('-q', '--quiet',
                        action='store_true', dest='quiet', help='activates quiet mode', default=False)
                verbosity.add_option('-s', '--simulate',
                        action='store_true', dest='simulate', help='do not download video', default=False)
                verbosity.add_option('-g', '--get-url',
                        action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
                verbosity.add_option('-e', '--get-title',
                        action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
                verbosity.add_option('--get-thumbnail',
                        action='store_true', dest='getthumbnail', help='simulate, quiet but print thumbnail URL', default=False)
                verbosity.add_option('--get-description',
                        action='store_true', dest='getdescription', help='simulate, quiet but print video description', default=False)
                verbosity.add_option('--no-progress',
                        action='store_true', dest='noprogress', help='do not print progress bar', default=False)
                parser.add_option_group(verbosity)
        
                filesystem = optparse.OptionGroup(parser, 'Filesystem Options')
                filesystem.add_option('-t', '--title',
                        action='store_true', dest='usetitle', help='use title in file name', default=False)
                filesystem.add_option('-l', '--literal',
                        action='store_true', dest='useliteral', help='use literal title in file name', default=False)
                filesystem.add_option('-A', '--auto-number',
                        action='store_true', dest='autonumber', help='number downloaded files starting from 00000', default=False)
                filesystem.add_option('-o', '--output',
                        dest='outtmpl', metavar='TEMPLATE', help='output filename template')
                filesystem.add_option('-a', '--batch-file',
                        dest='batchfile', metavar='FILE', help='file containing URLs to download (\'-\' for stdin)')
                filesystem.add_option('-w', '--no-overwrites',
                        action='store_true', dest='nooverwrites', help='do not overwrite files', default=False)
                filesystem.add_option('-c', '--continue',
                        action='store_true', dest='continue_dl', help='resume partially downloaded files', default=False)
                filesystem.add_option('--cookies',
                        dest='cookiefile', metavar='FILE', help='file to dump cookie jar to')
                parser.add_option_group(filesystem)
        
                (opts, args) = parser.parse_args()
        
                # Open appropriate CookieJar
                if opts.cookiefile is None:
                    jar = cookielib.CookieJar()
                else:
                    try:
                        jar = cookielib.MozillaCookieJar(opts.cookiefile)
                        if os.path.isfile(opts.cookiefile) and os.access(opts.cookiefile, os.R_OK):
                            jar.load()
                    except (IOError, OSError), err:
                        sys.exit(u'ERROR: unable to open cookie file')
        
                # General configuration
                cookie_processor = urllib2.HTTPCookieProcessor(jar)
                urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
                urllib2.install_opener(urllib2.build_opener(cookie_processor))
                socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
        
                # Batch file verification
                batchurls = []
                if opts.batchfile is not None:
                    try:
                        if opts.batchfile == '-':
                            batchfd = sys.stdin
                        else:
                            batchfd = open(opts.batchfile, 'r')
                        batchurls = batchfd.readlines()
                        batchurls = [x.strip() for x in batchurls]
                        batchurls = [x for x in batchurls if len(x) > 0 and not re.search(r'^[#/;]', x)]
                    except IOError:
                        sys.exit(u'ERROR: batch file could not be read')
                urlListing = []
                urlListing.append(self.urlListing2)
                all_urls = urlListing + args
        
                # Conflicting, missing and erroneous options
                if opts.bestquality:
                    print >>sys.stderr, u'\nWARNING: -b/--best-quality IS DEPRECATED AS IT IS THE DEFAULT BEHAVIOR NOW\n'
                if opts.usenetrc and (opts.username is not None or opts.password is not None):
                    parser.error(u'using .netrc conflicts with giving username/password')
                if opts.password is not None and opts.username is None:
                    parser.error(u'account username missing')
                if opts.outtmpl is not None and (opts.useliteral or opts.usetitle or opts.autonumber):
                    parser.error(u'using output template conflicts with using title, literal title or auto number')
                if opts.usetitle and opts.useliteral:
                    parser.error(u'using title conflicts with using literal title')
                if opts.username is not None and opts.password is None:
                    opts.password = getpass.getpass(u'Type account password and press return:')
                if opts.ratelimit is not None:
                    numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
                    if numeric_limit is None:
                        parser.error(u'invalid rate limit specified')
                    opts.ratelimit = numeric_limit
                if opts.retries is not None:
                    try:
                        opts.retries = long(opts.retries)
                    except (TypeError, ValueError), err:
                        parser.error(u'invalid retry count specified')
                try:
                    opts.playliststart = long(opts.playliststart)
                    if opts.playliststart <= 0:
                        raise ValueError
                except (TypeError, ValueError), err:
                    parser.error(u'invalid playlist start number specified')
                try:
                    opts.playlistend = long(opts.playlistend)
                    if opts.playlistend != -1 and (opts.playlistend <= 0 or opts.playlistend < opts.playliststart):
                        raise ValueError
                except (TypeError, ValueError), err:
                    parser.error(u'invalid playlist end number specified')
        
                # Information extractors
#                youtube_ie = YoutubeIE(self.downloadPath, tempTitleListing[titlesCounter]) ###FIXME - make it work for more thann one titles
                youtube_ie = YoutubeIE(self.parentControllerThread.downloadPath, self.title) ###FIXME - make it work for more thann one titles
                metacafe_ie = MetacafeIE(youtube_ie)
                dailymotion_ie = DailymotionIE()
                youtube_pl_ie = YoutubePlaylistIE(youtube_ie)
                youtube_user_ie = YoutubeUserIE(youtube_ie)
                youtube_search_ie = YoutubeSearchIE(youtube_ie)
                google_ie = GoogleIE()
                google_search_ie = GoogleSearchIE(google_ie)
                photobucket_ie = PhotobucketIE()
                yahoo_ie = YahooIE()
                yahoo_search_ie = YahooSearchIE(yahoo_ie)
                deposit_files_ie = DepositFilesIE()
                generic_ie = GenericIE()
                #increment the counter
#                titlesCounter = titlesCounter + 1
        
                # File downloader
                fd = FileDownloader({
                    'usenetrc': opts.usenetrc,
                    'username': opts.username,
                    'password': opts.password,
                    'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription),
                    'forceurl': opts.geturl,
                    'forcetitle': opts.gettitle,
                    'forcethumbnail': opts.getthumbnail,
                    'forcedescription': opts.getdescription,
                    'simulate': (opts.simulate or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription),
                    'format': opts.format,
                    'format_limit': opts.format_limit,
                    'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(preferredencoding()))
                        or (opts.format == '-1' and opts.usetitle and u'%(stitle)s-%(id)s-%(format)s.%(ext)s')
                        or (opts.format == '-1' and opts.useliteral and u'%(title)s-%(id)s-%(format)s.%(ext)s')
                        or (opts.format == '-1' and u'%(id)s-%(format)s.%(ext)s')
                        or (opts.usetitle and opts.autonumber and u'%(autonumber)s-%(stitle)s-%(id)s.%(ext)s')
                        or (opts.useliteral and opts.autonumber and u'%(autonumber)s-%(title)s-%(id)s.%(ext)s')
                        or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
                        or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
                        or (opts.autonumber and u'%(autonumber)s-%(id)s.%(ext)s')
                        or u'%(id)s.%(ext)s'),
                    'ignoreerrors': opts.ignoreerrors,
                    'ratelimit': opts.ratelimit,
                    'nooverwrites': opts.nooverwrites,
                    'retries': opts.retries,
                    'continuedl': opts.continue_dl,
                    'noprogress': opts.noprogress,
                    'playliststart': opts.playliststart,
                    'playlistend': opts.playlistend,
                    'logtostderr': opts.outtmpl == '-',
                    }, self)
                fd.add_info_extractor(youtube_search_ie)
                fd.add_info_extractor(youtube_pl_ie)
                fd.add_info_extractor(youtube_user_ie)
                fd.add_info_extractor(metacafe_ie)
                fd.add_info_extractor(dailymotion_ie)
                fd.add_info_extractor(youtube_ie)
                fd.add_info_extractor(google_ie)
                fd.add_info_extractor(google_search_ie)
                fd.add_info_extractor(photobucket_ie)
                fd.add_info_extractor(yahoo_ie)
                fd.add_info_extractor(yahoo_search_ie)
                fd.add_info_extractor(deposit_files_ie)
        
                # This must come last since it's the
                # fallback if none of the others work
                fd.add_info_extractor(generic_ie)
        
                # Update version
                if opts.update_self:
                    update_self(fd, sys.argv[0])
        
                # Maybe do nothing
                #if len(all_urls) < 1:
                 #   if not opts.update_self:
                  #      parser.error(u'you must provide at least one URL')
                   # else:
                    #    sys.exit()
                retcode = fd.download(all_urls)
        
                # Dump cookie jar if requested
                if opts.cookiefile is not None:
                    try:
                        jar.save()
                    except (IOError, OSError), err:
                        sys.exit(u'ERROR: unable to save cookie jar')
        
#                sys.exit(retcode)
        
            except DownloadError:
                sys.exit(1)
            except SameFileError:
                sys.exit(u'ERROR: fixed output name but more than one file to download')
            except KeyboardInterrupt:
                sys.exit(u'\nERROR: Interrupted by user')
                        